COOH Leudne (Leu,1) Proline (Pro,P) There are the one- HN-C-H RN+C-H letter and three-letter Alaine (Al A) Valine (Val,V) codes used to denote (b)Folar,unchargod amino acids.For each amino acid,the D00 ball-and-stick (left) and space-filling e(. (right)models show only the side chain HNT-C-H
There are the oneletter and three-letter codes used to denote amino acids. For each amino acid, the ball-and-stick (left) and space-filling (right) models show only the side chain
G00 Leudne (Leu,L) Alanine (Ala,A) Valine (Val,V) -C-H -G-H ● Gne(G水，a C-H -H NH. H-C-H H
Nonpolar,aliphatie R groups Aromatic R groups C00 C00 C00 C00 c00 C00 HNC-H HNC-H HNC-H HN-C-H HN一CH HNC-H 宜 C CH CH CH. CH CH CH C-CH Glycine Alanine Valine NH C00 C00 C00 OH HN-C-H HNC-H HN-C-H Phenylalanine Tyrosine Tryptophan CH2 H-C-CH CH CH CH, CH.CH, CH Positively charged R groups CH C00 C00 C00 Leucine Methionine Isoleucine HN-C-H HN-C-H HN-C-H CH2 CH, CH: Polar,uncharged R groups CH: CH: C-NH C00 C00 C00 CH CH2 CH HNC-H HN C-H HN-C-H CH2 NH CH OH H-C-OH CHa NH C-NHa CH3 SH NH Structural Serine Threonine Cysteine Lysine Arginine Histidine formula of 00 C00 C00 Negatively charged R groups - HN-C-H HN-CH C00 C00 the standard CH2 CH CH. HN-C-H HN-C-H H.C- 一CH amino acids CH. CH CHa C00 CH2 (L5-5) C00 Proline Asparagine Glutamine Aspartate Glutamate
Structural formula of the standard amino acids (L5-5)
Nonpolar,aliphatic R groups coo C00 coo HN-C-H HgN-C-H HN-C-H 五 CH3 CH CHs CHa Glycine Alanine Valine COO C00 C00 HgN-C-H HaN-C-H HaN-C-H CH2 CH2 H-C-CH3 CH CH2 CH2 CHs CH3 CH3 CH3 Leucine Methionine Isoleucine
Aromatic R groups COO C00 C00 HgN-C-H HgN-C-H HgN-C-H CH2 CH2 CH2 C-CH NH OH Phenylalanine Tyrosine Tryptophan